Pump



March 10, 1936. A.. E. coTHERMAN PUMP Filed Feb. l5, 1955 Patented Mar. 10, 1936 3 Claims.

The present invention relates particularly to deep well centrifugal pumps.

In the operation of deep well centrifugal pumps as heretofore constructed great loss is sustained through damage to the pump bearings by the sand carried by the water pumped. Where the percentage of sand is high the wear on the shaft and its bearings is correspondingly increased, resulting in the necessity for frequent repairs and replacements.

In order to prevent access of sand to the bearings insofar as may be possible considerable care must be taken in the selection of materials and their nish and fitting, thereby rendering a pump of this type expensive both in rst cost and in upkeep.

It is the object of my invention to provide a pump structure wherein the damage done by sand in the water pumped is reduced to a minimum, and one that will be economical to manufacture, simple in form and construction, easily assembled and disassembled, strong, durable, and highly eiiicient in its practical application.

In the construction of this pump I use rollers for centering the rotating parts upon a common axis, and consequently another object of my'invention is to provide rollers that will give long and satisfactory service under the conditions to which they are subjected.

In the drawing:

Figure 1 is a side elevation of a pump structure embodying my invention, one-half being in section and parts being broken away.

Figure 2 is a section on line 2 2 of Figure 1.

Figure 3 is a section on line 3-3, Figure l.

Referring now more particularly to the embodiment of the invention herein disclosed, I show at l a casing that may be of any desired dimensions and having a supporting member 2 depending from its lower end as at 3. The bearing member 2 supports an axially disposed hub i through the medium of webs 5, and in the hub 4 is ixedly mounted a shaft 6. This shaft 5 is a highly important part of the structure and extends upwardly from the hub in axial relationship to the casing l.

In effecting this invention the diiusion vanes 'I are in no Way connected to the surrounding bowl structure but are mounted at their inner edges on a hub member as 3 which is in turn xedly mounted on the shaft 6 as by spline t. These diffusion vanes therefore, have free upwardly curving outer edges lll which are contiguous to the inner surface of the surrounding bowl but do not contact the same.

(oi. 10s-102) Due to the rotor assembly hereinafter described the uppermost diffusion vane structure l---ll is not mounted upon the shaft 6, but the outer edges lil or" the vanes l support an annular member il which has an inner surface l2 substantially paralleling the outer surface of the hub member 8. Since this member curves or flares outwardly and its outer diameter is limited by the enclosing rotating structure it terminates at E3, thereby leaving a passage as iii open on its outer side to the rotating structure referred to and which will shortly be described.

The upper edge of member ii is threaded into and is supported by an adapter l seated in the top end of casing l and receiving the lower end of the discharge casing it.

At suitable points in the casing I are mounted annular members il, each member supporting a number of rubber rollers as i8.

At i9 is shown the body portion of a bowl disposed to encompass the entire structure 1, 8,

'9, l@ and having a threaded upper end as 20 eX- tendirng to a plane just below one member Il, and a lower edge 2i extending to a plane just below the lower ends of vanes l and threaded to receive or engage neck portion 22. The neck portion 22 supports impeller vanes 23 which in turn support a hub portion 2li which apiproaches but does not have actual rictional contact with the shaft 6 and hub member 8. The lower portion 25 cf part 22 rotates on rollers i8 at 2S and carries a ring 21 revolubly mounted in channel 28 in part 2.

Since the bowl-impeller structure is the one that revolves the hub portion 2i of the uppermost bowl is threaded on to a sleeve 29 as at it and the sleeve 29 is threaded on to a member 3l as at 32, the member 3l being in turn threaded on to a drive shaft 33. A packing 34 may be inserted between sleeve 2t and shaft 6 to prevent water and sand from being forced up around the upper portion of shaft 6.

The upper part of the top bowl i9 in the present case is carried upwardly around the part Il and has an annular member 35 threaded therein as at 36 to encompass the members il and l5 and prevent any substantial flow of water between the same.

Now when the drive shaft is rotated the sleeve 29 and the bowl-impeller structures suspended therefrom rotate as a unit therewith, the water being received by the stationary diusion vanes 'i and directed upwardly into the discharge casing.

The rotating parts are centered by and rotate upon the rubber rollers I8 where the contact is a rolling one instead of the usual sliding one and friction is reduced to a minimum. To further render the wear on the bowl negligible the rollers are made suflioiently soft to give to the hard sand particles no chance to cut into the metal.

Under a heavy head of water there will be some flow past ring 35 but the flow will be slow and the sand that does get by will drain back through the channel 28.

It is to be understood, of course, that while I have herein shown and described but one specific embodiment of the invention, changes in form, construction, and method of assembly and operation may be made within the scope of the appended claims.

I claim:

1. A pump comprising, in combination, a discharged casing column, an upstanding shaft ixedly mounted therein in axial relation thereto, diffusion vanes disposed therein in xed relation thereto, the uppermost diffusion vanes being entirely supported by the discharge casing and the lower diffusion vanes being supported entirely by the upstanding shaft, a revoluble shaft extending downwardly over the iixed shaft, a revoluble bowl assembly depending from the revoluble shaft between the uppermost diiusion vanes and the next lower diffusion vanes and encompassing both the uppermost and lower diffusion vanes and having impeller vanes disposed therein to discharge to1 the diffusion vanes.

2. In a pump structure of the character described, upper and lower pipe casing sections, an annular adapter connecting said sections, an upstanding shaft xedly supported in the lower section, a revoluble shaft extending dowm Wardly over the iixed shaft and a bearing between said shafts, an annular member including an outer wall xedly mounted on the adapter in spaced relation to the lower section, a hub portion encompassing the revoluble shaft, and diffusion vanes connecting said hub and wall portions, and a bowl assembly provided with impeller vanes discharging to the diffusion vanes mounted on the revoluble shaft and having a part extending upwardly between the lower section and the xed annular member.

3. A pump comprising, a discharge casing, an upstanding shaft xedly supported therein, a revoluble shaft extending over the xed shaft, an annular member ixedly supported in the casing and having a wall portion projecting into the casing in spaced relation thereto, a hub portion encompassing the revoluble shaft and diffusion vanes connecting said hub and wall portions, and a bowl assembly provided with impeller vanes discharging to the diffusion vanes mounted on the revoluble shaft and having a part extending between the casing and the xed annular member.

ALEXANDER E. COTHERMAN. 

